A Step Towards a 170 GHz, 5 MW coaxial super gyrotron

Abstract

Gyrotrons are high power microwave sources widely employed for electron cyclotron resonance heating (ECRH) of plasmas, and in other industnal and scientific applications. Recent experiments at FZK and IAP [1 ,2] suggest that conventional and coaxial cavity gyrotrons delivering in excess of 2 MW power at frequencies ranging from 140-170 GHz operating with very high order volume modes have successfully been realized. In this work, the feasibility of a super power coaxial gyrotron at 5 MW, 170 GHz, operating in the TE44.44mode is presented as a small step towards a big leap from 2 MW to 5 MW power levels. Such a realization will drastically reduce the number of gyrotrons operating in tandem in tokamak installations. The basic impetus and motivation to consider such a high volume mode is provided by the recent works at IAP [2]. © 2003 IEEE.